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What are dimensions ? Give an ex...

What are dimensions ? Give an example.

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Dimensions are the powers to which the fundamental units or quantities are raised to represent a given physical quantity.
e.g., : Dimensions of length, mass and time in the formula for gravitational constant ` ( M^ ( -1) L ^ ( 3)T^( -2) ) ` are 3, -1 and -2 respectively.
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SUBHASH PUBLICATION-UNITS AND MEASUREMENTS -TWO MARKS QUESTIONS WITH ANSWERS
  1. What are dimensions ? Give an example.

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  2. What is a dimensional formula ? Give an example for a physical...

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  3. What is meant by dimensional equation ? Give an example.

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  4. Give any two examples for a dimensional constant.

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  5. Give any two examples for a dimensionless physical quantity.

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  6. Explain what is meant by dimensional analysis.

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  7. Define the term significant figures with an example.

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  8. What is meant by error in measurements ? Give an example.

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  9. Find the fractional error in the measurement of x = A^mB^ n

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  10. Suggest any two methods of minimizing the errors.

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  11. Distinguish between random error and constant error.

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  12. What is meant by absolute error ?

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  13. Mention the number of significant figures in the following. ...

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  14. Each side is measured to be 7.203 m. What are the total sur...

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  15. If A = (12.0 pm 0.1) cm and B = (8.5 pm 0.5) cm find (i) ...

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  16. If the size of a nucleus (in the range of 10^(-15) to 10^(-14)) is sc...

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  17. Convert 48 kmph in terms ms ^( -1).

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  18. Convert 32.2 ft s ^ ( - 2 ) in terms of ms ^( -2).

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  19. (P + ( a ) / ( V^ 2)) ( V - b ) = RT is the real gas equati...

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  20. Write the dimensional formula for (1) voltage and (2) resis...

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